Re: [PATCH 2/3] sky2: Reading registers in reset causes a hang

On Mon, 12 Oct 2009 23:06:37 +0900
Mike McCormack [off-list ref] wrote:

When sky2 hardware is in reset, reading registers with ethtool -d
causes a hard system hang. eg.

    ifconfig eth1 down
    ethtool -d eth1

Avoid reading FIFOs, descriptor and status unit, etc. after we've
 bought the interface down, as these seem to cause the issue.

Assume the same is true for the second port, as my port only has
 one card.

I don't see this on my cards. Let me investigate further before
committing this. Also, the debugfs interface would also be screwed
if the registers were unavailable.